Series 14b - Type HD

Transcription

1 High-Performance Control and Shut-off Butterfly Valve Series 14b - Type HD Application: Tight-closing, double-eccentric butterfl y valve especially for high requirements in the chemical industry, for example in steam pipelines: Nominal sizes NPS 3 to 16 and DN 80 to 400 Nominal pressure ANSI Class 150 and Class 300 and PN 10 to 40 Temperatures 320 to 1022 F ( 196 to 550 C) Our newly developed high performance shut-off and control butterfl y valve has the following special features: Valve body Steel Stainless steel Fig. 1 - Series 14b - Type HD Butterfl y Valve with Series 31a Rotary Actuator Body style Wafer-type Lug-type Disk sealing Soft-seated disk with adjustable graphite packing Metal-seated disk with adjustable graphite packing Further features Low breakaway torque and low amount of wear due to the double-eccentric bearing design of the shaft TA-Luft (German clean air act) packing Anti-blowout shaft Soft seat rings can be replaced with metal seat rings on site Face-to face dimensions acc. to API 609 Class 150/300 Face-to face dimensions acc. to DIN EN 558, series 20, 25 and 16 Face-to-face dimensions can be changed by using different fastening ring Attachment options acc. to DIN ISO 5211 Fig. 2 - Series 14b - Type HD Butterfl y Valve with Series 31a Rotary Actuator 1 of 8

2 Pfeiffer Chemie-Armaturenbau GmbH Fig. 3 - Sectional diagram of Series 14 - Type HD Butterfl y Valve Item Description 1 Valve body 2 Valve shaft 3 Shaft head 4 Valve disk 5 Valve disk ring 6 Intermediate fl ange 7 Bonnet 8 Stuffi ng box 9 Stuffing box fl ange 10 Fastening ring 11 Bearing bushing 12 Bearing bushing 13 Spacer 14 Set of Belleville spring washers 15 Seat ring 16 V-ring packing 17 Graphite packing 18 Thrust washer 19 Counter washer 20 Guide washer 21 PTFE ring 22 Graphite ring 23 O-ring 24 Graphite ring 25 O-ring 26 O-ring 27 Graphite ring 28 PTFE ring 29 Screw 30 Screw 31 Screw 32 Screw 33 Stud bolt 34 Nut 35 Straight pin 36 Feather key notch 37 Screw Table 1 - Parts list 2 of 8

3 Version Series 14b - Type HD Butterfl y Valve available also in the following versions, depending on the nominal size: Butterfl y valve with manual gear actuator Butterfl y valve with pneumatic actuator Special versions Shaft sealed by loaded PTFE V-ring packing Nominal size > DN 400 Double stuffi ng box Primary seal with O-ring Flange with groove acc. to DIN EN 1092 (series 16 and 25 only) Special materials High-temperature version (> 550 C) Low-temperature version ( 196 C) Additional accessories The butterfl y valves are also available with single accessories or a combination of accessories: Positioner Limit switch Solenoid valves Supply air reducing stations Pressure gauge blocks Other special accessories are available on request. Principle of operation The process medium can fl ow through the valve in both directions. The disk ( 4 ) determines the fl ow through the free area between disk and seat ( 15 ). Butterfly valves are sealed between the disk ( 4 ) and the seat ( 15 ). The shaft ( 2 ) is sealed by a packing ( 16 ). The standard packing is a graphite/inconel packing which is loaded by an adjustable stuffing box. Optionally, a maintenance-free PTFE V-ring packing can be used which is loaded by Belleville spring washers ( 14 ). The direction of flow and the differential pressure determine the breakaway torque to open the butterfl y valve. The double-eccentric bearing design of the shaft causes the disk on opening and closing to remain in contact with the seat only over a very small angle of rotation ( Fig. 4 ). This reduces wear and increases the service life of the valve. In addition, it reduces the breakaway torque. When the process medium fl ows through the valve in direction A ( Fig. 4 ), the butterfl y disk is slightly pressed out of the seat. This reduces the pre-load force and the breakaway torque. When the process medium fl ows through the valve in direction B, the pre-load force increases as the breakaway torque rises. Functional diagram Fail-safe position: Depending on how the actuator is mounted, there are two fail-safe positions, which become active when the pressure is relieved and upon failure of air supply: Butterfly valve with actuator fail-close Upon failure of the air supply, the butterfl y valve closes. The valve opens as the signal presure increases, opposing the force of the springs. Butterfly valve with actuator fail-open Upon failure of the air supply, the butterfl y valve opens. The valve closes as the signal presure increases, opposing the force of the springs. Note: These valves are not subject to ATEX 94/9/EC. 3 of 8

4 Pfeiffer Chemie-Armaturenbau GmbH Technical data Leakage for Face-toface dimensions Nominal size NPS 3 to 16 or DN 80 to 400 Nominal pressure ANSI Class 150/300 or PN 10 to 40 Body style Lug-type or wafer-type Seat ring Direction of fl ow A Direction of fl ow B PTFE, live-loaded Soft sealing PTFE with glass On request (depends on pressure and temperature) Leakage rate A acc. to DIN EN , P12 Rangeability 50 : 1 ANSI DIN Perm. operating pressure Table 2 - Technical data API Class 150 API Class 300 According to DIN EN 558, Series 20 Special version: according to DIN EN 558, Series 25, 16 See pressure-temperature diagram Metal sealing Leakage rate acc. to DIN EN 1349 (IV-VI) Materials Table 3 - Materials Steel Stainless steel Valve body A216 WCB (1.0619) A351 CF8M (1.4408) Valve disk and disk ring A216 WCB (1.0619) A351 CF8M (1.4408)) Valve shaft and shaft head A182 F51 (1.4462) / AISI 630 (1.4542) Seat ring Soft sealing PTFE live-loaded / PTFE with glass metal sealing /graphite/nickel Fastening ring A479 F316Ti (1.4571) Stuffi ng box fl ange A479 F316Ti (1.4571) Packing Adjustable carbon-graphite packing / Loaded PTFE V-ring packing Terms for noise level calculation φ z Table 4 - Noise level calculation and terms for control valve sizing z values for noise level calculation acc. to VDMA and terms for control valve sizing acc. to DIN EN Correction terms with gases and vapors LG = 0 with liquids LF = 0 4 of 8

5 Valve sizing terms Pressure range φ ANSI Class 150 PN 10/16 ANSI Class 300 PN 25/40 Table 5 - Valve sizing terms FL XT FL XT Kv and Cv coefficients and related opening angles Pressure rating DN NPS Opening angle φ mm inch Kv Cv Kv Cv Kv Cv Kv Cv Kv Cv Kv Cv Kv Cv Kv Cv Kv Cv ANSI Class 150/300 PN Table 6 - Cv and Kv coeffi cients 5 of Torque and breakaway torques Valve size NPS 3/ DN 80 NPS 4/ DN 100 NPS 6/ DN 150 NPS 8/ DN 200 NPS 10/ DN 250 NPS 12/ DN 300 NPS 14/ DN 350 NPS 16/ DN 400 Perm. torques Mdmax. in Nm with shaft in / H1150 Soft-seated butterfly disk Breakaway torque Mdl in Nm with differential pressure p in bar (direction of fl ow B) Metal-seated butterfly disk Breakaway torque Mdl in Nm with differential pressure p in bar (direction of flow A) Table 7 - Max. permissible torque and breakaway torque The breakaway torques specifi ed are average values which were measured with air at 20 C with the corresponding differential pressure. Operating temperature, process medium and long operating times may affect the permissible torques and breakaway torques considerably.

6 Pfeiffer Chemie-Armaturenbau GmbH Pressure-temperature diagram The area of application is determined by the pressure-temperature diagram. Process data and the process medium may affect the values in the diagram. Fig. 5 - Pressure-temperature diagram The maximum temperature is restricted to 200 C when PTFE seat rings are used. Dimensions and weights Fig. 6 - Dimensions 6 of 8

7 L ØD Lug-type ØD Wafertype ØK n x P Lug-type Valve sizes DN 80/ NPS 3 DN 100/ NPS 4 DN 150/ NPS 6 DN 200/ NPS 8 DN 250/ NPS 10 DN 300/ NPS 12 DN 350/ NPS 14 DN 400/ NPS 16 PN 10 to Optionally PN 10 to ANSI Class ANSI Class A B C A B C a SW DIN / ISO F07 F07 F10 F12 F12 F16 F16 F16 PN PN PN PN ANSI Class ANSI Class PN PN PN PN ANSI Class ANSI Class PN PN PN PN ANSI Class ANSI Class PN 10 8 x M16 8 x M16 8 x M20 8 x M20 12 x M20 12 x M20 16 x M20 16 x M24 PN 16 8 x M16 8 x M16 8 x M20 12 x M20 12 x M24 12 x M24 16 x M24 16 x M27 PN 25 8 x M16 8 x M20 8 x M24 12 x M24 12 x M27 16 x M27 16 x M30 16 x M33 PN 40 8 x M16 8 x M20 8 x M24 12 x M27 12 x M30 16 x M30 16 x M33 16 x M36 ANSI Class x 5/8 8 x 5/8 8 x 3/4 8 x 3/4 12 x 7/8 12 x 7/8 12 x 1 16 x 1 ANSI Class x 5/8 8 x 3/4 12 x 3/4 12 x 7/8 16 x 1 16 x 11/8 20 x 11/8 20 x 11/4 PN 10 8 x 18 8 x 18 8 x 22 8 x x x x x 26 PN 16 8 x 18 8 x 18 8 x x x x x x 30 n x ØP PN 25 8 x 18 8 x 22 8 x x x x x x 36 Wafertype PN 40 8 x 18 8 x 22 8 x x x x x x 39 ANSI Class x x x x x x x x 28.4 ANSI Class x x x x x x x x 35.1 E Ød m x e 1 x 5 1 x 5 2 x 6 2 x 8 2 x 8 2 x 10 2 x 12 1 x 14 Table 8 - Dimensions in mm and weights in kg 7 of 8

8 Pfeiffer Chemie-Armaturenbau GmbH Functional diagram with opening angles Selecting and sizing the butterfly valve 1. Calculate the appropriate Kv coeffi cient. 2. Select the nominal size and Kvs coeffi cient from Table Check the operation conditions taking the pressuretemperature diagram into account. 4. Select a suitable actuator. Ordering text High-Performance Butterfly Valve Series 14b - Type HD Nominal size DN.... Nominal pressure PN.... Valve body material Acc. to Table 2 Seat seal Direction of fl ow Metal sealing or soft sealing A standard direction of fl ow for throttling service B reversed direction of fl ow for shut-off service Fig. 7 Functional diagram with opening angles Characteristic curve Manual gear or actuator Brand name:.... Fail-safe position Valve OPEN or valve CLOSED Supply air.... bar Operating range Number of springs Operating pressure.... bar Medium temperature.... C or.... F Medium Dry or lubricating Limit switch Brand name:.... Solenoid valve Brand name:.... Positioner Brand name:.... Others.... Note: All relevant details regarding the version ordered, which deviate from the specifi ed version in this data sheet can be taken if required, from the corresponding order confirmation. Fig. 8 - Characteristic curve 8 of 8 Specifications and versions are subject to modification without notice Edition May 2012 Data sheet DB 14b-07_EN PDF=1107